Fair Value Measurements (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Life Insurance, Corporate or Bank Owned, Amount	$ 38,200	$ 41,100
Deferred Compensation Liability, Current and Noncurrent	38,300	41,000
Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Carrying Value of Senior Notes, net	994,900	994,300
Fair Value, Inputs, Level 1 \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt Instrument, Fair Value Disclosure	983,000	1,040,000
Fair Value, Inputs, Level 2 \| Other Current Assets [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net investment hedges - foreign currency forward contracts	0	812
Cash flow hedge - cross-currency swap	0	124
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	3,113	3,675
Fair Value, Inputs, Level 2 \| Other Noncurrent Assets [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net investment hedges - foreign currency forward contracts	0	24,933
Fair Value, Inputs, Level 2 \| Other Current Liabilities [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash flow hedge - cross-currency swap	0	492
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	$ 4,480	$ 5,916

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Fair value of all derivative assets designated as hedges of net investment in foreign operations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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